/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Add a new timeline with the supplied name to the blueprint
static [UTimelineTemplate](API\Runtime\Engine\Engine\UTimelineTemplate) * AddNewTimeline ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, const [FName](API\Runtime\Core\UObject\FName) & TimelineVarName )